stealc | 7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722

General

Target

7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe
Size

2.0MB
MD5

0e9f62b33969cd1d4708e11376f017c2
SHA1

4766b61b941c9ae58c0929664778b5d46cd87e9a
SHA256

7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722
SHA512

bf9c4cad3299cdfcf55a0f1bdee15e07edfcae700d4de6211e9b45f1df7013d51590eda070b3f5c72121b366c50c6e41f32bb8c1f6ca34fc3e98a5d7277564f1
SSDEEP

49152:7QzHt472DNJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtLtIuoITsdZ

Score

10^/10

stealc vidar discovery spyware stealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

Detect Vidar Stealer 8 IoCs

stealer

Processes:

resource	yara_rule
behavioral1/memory/1284-2-0x0000000004020000-0x0000000004169000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-4-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-10-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-9-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-14-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-15-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-32-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7
behavioral1/memory/3484-33-0x0000000000400000-0x0000000000646000-memory.dmp	family_vidar_v7

Stealc
Stealc is an infostealer written in C++.
stealer stealc
Vidar
Vidar is an infostealer based on Arkei stealer.
stealer vidar
Downloads MZ/PE file
Executes dropped EXE 1 IoCs

Processes:

kat3AC7.tmp

pid process

3484 kat3AC7.tmp
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001
Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

pid	process
3484	kat3AC7.tmp

Suspicious use of SetThreadContext 1 IoCs

Processes:

7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe

description	pid	process	target process
PID 1284 set thread context of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp

Checks processor information in registry 2 TTPs 1 IoCs
Processor information is often read in order to detect sandboxing environments.

Query Registry
T1012

System Information Discovery
T1082

Processes:

kat3AC7.tmp

description ioc process

Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString kat3AC7.tmp
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

kat3AC7.tmp

pid process

3484 kat3AC7.tmp
3484 kat3AC7.tmp

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	kat3AC7.tmp

pid	process
3484	kat3AC7.tmp
3484	kat3AC7.tmp

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe

description	pid	process	target process
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp
PID 1284 wrote to memory of 3484	1284	7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe	kat3AC7.tmp

C:\Users\Admin\AppData\Local\Temp\7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe
"C:\Users\Admin\AppData\Local\Temp\7939855bf8d006f2c8869cc97c4fb464860564dbf4ca79a32cd3afd160961722.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1284

C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
2⤵
- Executes dropped EXE
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
PID:3484

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Unsecured Credentials

1

T1552

Credentials In Files

1

T1552.001

Discovery

Query Registry

2

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Data from Local System

1

T1005

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\kat3AC7.tmp
Filesize
861KB

MD5
66064dbdb70a5eb15ebf3bf65aba254b

SHA1
0284fd320f99f62aca800fb1251eff4c31ec4ed7

SHA256
6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

SHA512
b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

Download Submit
memory/1284-0-0x0000000002470000-0x0000000002471000-memory.dmp

Filesize
4KB

Download
memory/1284-2-0x0000000004020000-0x0000000004169000-memory.dmp

Filesize
1.3MB

Download
memory/1284-8-0x0000000000400000-0x0000000000601000-memory.dmp

Filesize
2.0MB

Download
memory/3484-4-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-10-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-9-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-14-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-15-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-17-0x000000001DBA0000-0x000000001DDFF000-memory.dmp

Filesize
2.4MB

Download
memory/3484-32-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download
memory/3484-33-0x0000000000400000-0x0000000000646000-memory.dmp

Filesize
2.3MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads